<template>
  <div>
    <div class="CitySearch">
      <input v-model.trim="keyword" class="search-input" type="text" placeholder="输入城市名或者拼音">
    </div>
    <div class="search-content" ref="serach" v-show="keyword">
      <ul>
        <li
          class="search-item"
          v-for="(item, index) in list"
          :key="index"
          @click = "handleCityClick(item.name)"
          >
          {{item.name}}
        </li>
        <li class="search-item  border-bottom" v-show="hashNoData">没有找到匹配数据</li>
      </ul>
    </div>
  </div>
</template>

<script>
import {mapMutations} from 'vuex'
import BScroll from 'better-scroll'
import ObserveDom from '@better-scroll/observe-dom'
BScroll.use(ObserveDom)

export default {
  name: 'CitySearch',
  props: {
    cities: Object
  },
  computed: {
    hashNoData () {
      return !this.list.length
    }
  },
  data () {
    return {
      keyword: '',
      list: [],
      timmer: null
    }
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.search, {observeDOM: true
    })
  },
  watch: {
    keyword () {
      if (!this.keyword) {
        this.list = []
        return
      }
      if (this.timmer) {
        clearTimeout(this.timmer)
      }
      this.timmer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
              result.push(value)
            }
          })
        }
        this.list = result
      }, 1000)
    }
  },
  methods: {
    handleCityClick (city) {
      // console.log(city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  }
}
</script>

<style lang="stylus" scoped>
@import "~styles/varibles.styl";
  .CitySearch
    height: .72rem
    padding 0 .1rem
    background $bgColor
    .search-input
      width: 100%
      box-sizing: border-box
      height: .62rem
      padding 0 .1rem
      line-height .62rem
      text-align: center
      border-radius: .06rem
      color: #666
  .search-content
    z-index 1
    overflow-x: hidden
    position absolute
    top 1.58rem
    left 0
    right: 0
    bottom: 0
    background #eee
    .search-item
      line-height .62rem
      padding-left  .2rem
      background #fff
      color  #666
</style>
